Swordfish \Sword"fish`\, n.

1. (Zo["o]l.)
   (a) A very large oceanic fish (Xiphias gladius), the only representative of the family Xiphiid[ae]. It is highly valued as a food fish. The bones of the upper jaw are consolidated, and form a long, rigid, swordlike beak; the dorsal fin is high and without distinct spines; the ventral fins are absent. The adult is destitute of teeth. It becomes sixteen feet or more long.
   (b) The gar pike.
   (c) The cutlass fish.

2. (Astron.) A southern constellation. See Dorado, 1.

Swordfish sucker (Zo["o]l.), a remora (Remora brachyptera) which attaches itself to the swordfish.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Cutlass \Cut"lass\ (k[u^]t"las), n.; pl. Cutlasses (-[e^]z). [F. coutelas (cf. It. coltellaccio), augm. fr. L. cultellus a small knife, dim. of culter knife. See Colter, and cf. Curtal ax.]

A short, heavy, curving sword, used in the navy. See Curtal ax.

Cutlass fish, (Zo["o]l.), a peculiar, long, thin, marine fish (Trichiurus lepturus) of the southern United States and West Indies; -- called also saber fish, silver eel, and, improperly, swordfish.

Source: Webster's Revised Unabridged Dictionary (1913)